I'm having a problem playing the Audio from my TV through the speakers of the surround sound. I have a HDMI cable connected and it plays great for DVD's but when I try to map the audio it says no HDMI device found. Not sure what to do any help would be greatly appreciated!!!

I'm having a problem playing the Audio from my TV through the speakers of the surround sound. I have a HDMI cable connected and it plays great for DVD's but when I try to map the audio it says no HDMI device found. Not sure what to do any help would be greatly appreciated!!!